Systems and methods for improving accuracy of device maps using media viewing data

ABSTRACT

Provided are methods, devices, and computer-program products for determining an accuracy score for a device mapping system. In some examples, the accuracy score can be based on a device map of the device mapping system and viewing data from an automated content recognition component. In such examples, the accuracy score can indicate whether the device mapping system is assigning similar categories to devices that have similar player of media content. In some examples, a device map can be determined to be random, indicating that the device mapping system is inaccurate. In contrast, if the device map is determined to have a sufficiently low probability of being merely random in nature, the device mapping system can be determined to be accurate.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of U.S. Provisional Application No.62/482,495, filed Apr. 6, 2017, which is hereby incorporated byreference in its entirety for all purposes.

FIELD

The present disclosure relates generally to improving accuracy of dataderived from analysis of connected devices and their association withparticular categories.

BACKGROUND

Users are increasingly accessing media across a range of devices.However, determining which devices are associated with particular userscan be difficult. Many systems exist that purport to map devices toparticular categories (sometimes referred to as device mapping or devicegraphing). For example, a device mapping system can generate a devicemap indicating that a first device and a second device belong to aparticular category. In some examples, the devices can me mapped to aparticular user based on the categories assigned to each device. Inother examples, the devices are assigned into a household-wide devicemap. However, accuracy of the device map is difficult to assess.Therefore, there is a need in the art to determine and improve theaccuracy of device maps.

SUMMARY

Provided are methods, devices, and computer-program products fordetermining an accuracy score for a device mapping system by processingmedia (e.g., video and/or audio data) being played by one or moredevices. In some examples, the accuracy score can be based on a devicemap of the device mapping system. In such examples, the device map canpurport to link devices that are associated together.

In some examples, the accuracy score can be further based on mediacontent viewing data from an automated content recognition (ACR) systemor other system that can determine media content being viewed by one ormore media player devices. In some cases, the media content can includevideo content (which can include audio content) or audio content. Themedia content can be processed and analyzed (e.g., using an ACR system)to determine media content that is being viewed by one or more mediaplayer devices, which can be stored as viewing data. In one illustrativeexample when an ACR system is used to determine media content beingviewed by a media player device, the media player device can decodevideo data (and, in some cases, audio data) associated with videoprograms. The media player device can place the decoded contents of eachframe of the video into a video frame buffer in preparation for displayor for further processing of pixel information of the video frames. Themedia player device can process the buffered video data and can produceunknown data points (which can be referred to as “cue points”)representing an unknown video segment currently being played by theplayer device. A matching server can receive the unknown cue points, andcan compare the unknown cue points with stored candidate cue points todetermine a match between a candidate video segment and the unknownvideo segment.

The viewing data can then be processed to determine the accuracy score.In such examples, the media viewing data (sometimes referred to asviewing behavior) can indicate media content being played by a mediaplayer device. In some examples, the accuracy score can indicate whetherthe device mapping system is assigning similar categories to devicesthat have similar playback of media content. In such examples, thedevice map can be compared to device-category designations that areassigned based on randomness to determine an accuracy of the devicemapping system. If the device map is determined to have a sufficientlylow probability of being merely random in nature, the device mappingsystem can be determined to be accurate.

In some examples, the accuracy score can be used by the device mappingsystem to improve its process for generating the device map. Forexample, the device mapping system can modify one or more operations toattempt to improve the accuracy score.

In some examples, a system is provided that includes one or moreprocessors and one or more non transitory machine readable storage mediacontaining instructions that, when executed on the one or moreprocessors, cause the one or more processors to perform operations. Theoperations include obtaining a plurality of categories assigned togroups of media player devices. The plurality of categories aredetermined using a device mapping system. A category includes acategorization for a group of the media player devices. The operationsfurther include determining viewing behaviors of the groups of mediaplayer devices. The viewing behaviors are determined using automatedcontent recognition by matching viewed media content viewed by the mediaplayer devices with stored media content. The operations further includedetermining a correlation between the plurality of categories and theviewing behaviors of the groups of media player devices, and determiningan accuracy score for the device mapping system using the determinedcorrelation. The operations further include assigning the accuracy scoreto the device mapping system, wherein the accuracy score is used toimprove the device mapping system.

In some examples, a method is provided that includes obtaining aplurality of categories assigned to groups of media player devices. Theplurality of categories are determined using a device mapping system. Acategory includes a categorization for a group of the media playerdevices. The method further includes determining viewing behaviors ofthe groups of media player devices. The viewing behaviors are determinedusing automated content recognition by matching viewed media contentviewed by the media player devices with stored media content. The methodfurther includes determining a correlation between the plurality ofcategories and the viewing behaviors of the groups of media playerdevices, and determining an accuracy score for the device mapping systemusing the determined correlation. The method further includes assigningthe accuracy score to the device mapping system, wherein the accuracyscore is used to improve the device mapping system.

In some examples, computer-program product tangibly embodied in anon-transitory machine-readable storage medium is provided that includesinstructions that, when executed by the one or more processors, causethe one or more processors to: obtain a plurality of categories assignedto groups of media player devices, wherein the plurality of categoriesare determined using a device mapping system, and wherein a categoryincludes a categorization for a group of the media player devices;determine viewing behaviors of the groups of media player devices,wherein the viewing behaviors are determined using automated contentrecognition by matching viewed media content viewed by the media playerdevices with stored media content; determine a correlation between theplurality of categories and the viewing behaviors of the groups of mediaplayer devices; determine an accuracy score for the device mappingsystem using the determined correlation; and assign the accuracy scoreto the device mapping system, wherein the accuracy score is used toimprove the device mapping system.

In some aspects, the correlation between the plurality of categories andthe viewing behaviors of the groups of media player devices is based ona variance in viewing behaviors among the plurality of categories.

In some aspects, determining the accuracy score for the device mappingsystem includes performing a statistical hypothesis test to determinewhether the correlation between the plurality of categories and theviewing behaviors of the groups of media player devices is random.

In some aspects, the system, method, and computer-program productinclude comparing a result of the statistical hypothesis test to arandomness threshold, and determining the correlation is random when theresult is less than the randomness threshold.

In some aspects, the accuracy score is determined for the device mappingsystem based on the comparison of the result of the statisticalhypothesis test to the randomness threshold.

In some aspects, media content is video content, and performing theautomated content recognition includes: receiving a pixel cue pointassociated with a frame of an unknown video segment, wherein the pixelcue point includes a set of pixel values corresponding to the frame;identifying a candidate reference data point in a database of referencedata points, wherein the candidate reference data point is similar tothe pixel cue point, and wherein the candidate reference data pointincludes one or more pixel values corresponding to a candidate frame ofa candidate video segment; adding a token to a bin associated with thecandidate reference data point and the candidate video segment;determining whether a number of tokens in the bin exceeds a value; andidentifying the unknown video segment as matching the candidate videosegment when the number of tokens in the bin exceeds the value.

In some aspects, the viewing behaviors include at least one or more ofan amount of time of the groups of media player devices view one or moreof a plurality of channels, incomes associated with users of the groupsof media player devices, age groups of users of the groups of mediaplayer devices, education levels of users of the groups of media playerdevices, or numbers of devices in the groups of media player devices.

This summary is not intended to identify key or essential features ofthe claimed subject matter, nor is it intended to be used in isolationto determine the scope of the claimed subject matter. The subject mattershould be understood by reference to appropriate portions of the entirespecification of this patent, any or all drawings, and each claim.

The foregoing, together with other features and embodiments, will becomemore apparent upon referring to the following specification, claims, andaccompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

Illustrative embodiments of the present invention are described indetail below with reference to the following drawing figures:

FIG. 1 illustrates an example of a system for updating a device mapcategorization system;

FIG. 2A illustrates an example of a graph comparing viewing time tochannel variance for a first source;

FIG. 2B illustrates an example of a graph comparing viewing time tochannel variance for a second source;

FIG. 2C illustrates an example of a graph comparing viewing time tochannel variance for a third source;

FIG. 3 illustrates an example of computing f-ratios for various sources;

FIG. 4 illustrates an example of a process for assigning an accuracyscore to a device map matching process;

FIG. 5 illustrates an example of a process for evaluating thestatistical correlation of a plurality of devices to predictedstatistical attributes;

FIG. 6 illustrates an example of a process for comparing predictedviewing behavior to actual viewing as measured by an automatic contentrecognition component;

FIG. 7 illustrates an example of a block diagram of a matching systemfor identifying video content being viewed by a media system;

FIG. 8 illustrates an example of a process flow for various devices;

FIG. 9 illustrates an example of a first match rate equating incomecodes versus viewing hours per month;

FIG. 10 illustrates an example of a second match equating income codesversus viewing hours per month; and

FIG. 11 illustrates an example of media devices only found in data settwo equating income code versus viewing hours per month.

DETAILED DESCRIPTION

In the following description, for the purposes of explanation, specificdetails are set forth in order to provide a thorough understanding ofembodiments of the invention. However, it will be apparent that variousembodiments may be practiced without these specific details. The figuresand description are not intended to be restrictive.

The ensuing description provides exemplary embodiments only, and is notintended to limit the scope, applicability, or configuration of thedisclosure. Rather, the ensuing description of the exemplary embodimentswill provide those skilled in the art with an enabling description forimplementing an exemplary embodiment. It should be understood thatvarious changes may be made in the function and arrangement of elementswithout departing from the spirit and scope of the invention as setforth in the appended claims.

Specific details are given in the following description to provide athorough understanding of the embodiments. However, it will beunderstood by one of ordinary skill in the art that the embodiments maybe practiced without these specific details. For example, circuits,systems, networks, processes, and other components may be shown ascomponents in block diagram form in order not to obscure the embodimentsin unnecessary detail. In other instances, well-known circuits,processes, algorithms, structures, and techniques may be shown withoutunnecessary detail in order to avoid obscuring the embodiments.

Also, it is noted that individual embodiments may be described as aprocess which is depicted as a flowchart, a flow diagram, a data flowdiagram, a structure diagram, or a block diagram. Although a flowchartmay describe the operations as a sequential process, many of theoperations can be performed in parallel or concurrently. In addition,the order of the operations may be re-arranged. A process is terminatedwhen its operations are completed, but could have additional steps notincluded in a figure. A process may correspond to a method, a function,a procedure, a subroutine, a subprogram, etc. When a process correspondsto a function, its termination can correspond to a return of thefunction to the calling function or the main function.

The term “machine-readable storage medium” or “computer-readable storagemedium” includes, but is not limited to, portable or non-portablestorage devices, optical storage devices, and various other mediumscapable of storing, containing, or carrying instruction(s) and/or data.A machine-readable storage medium or computer-readable storage mediummay include a non-transitory medium in which data can be stored and thatdoes not include carrier waves and/or transitory electronic signalspropagating wirelessly or over wired connections. Examples of anon-transitory medium may include, but are not limited to, a magneticdisk or tape, optical storage media such as compact disk (CD) or digitalversatile disk (DVD), flash memory, memory or memory devices. Acomputer-program product may include code and/or machine-executableinstructions that may represent a procedure, a function, a subprogram, aprogram, a routine, a subroutine, a module, a software package, a class,or any combination of instructions, data structures, or programstatements. A code segment may be coupled to another code segment or ahardware circuit by passing and/or receiving information, data,arguments, parameters, or memory contents. Information, arguments,parameters, data, or other information may be passed, forwarded, ortransmitted using any suitable means including memory sharing, messagepassing, token passing, network transmission, or other transmissiontechnique.

Furthermore, embodiments may be implemented by hardware, software,firmware, middleware, microcode, hardware description languages, or anycombination thereof. When implemented in software, firmware, middlewareor microcode, the program code or code segments to perform the necessarytasks (e.g., a computer-program product) may be stored in amachine-readable medium. A processor(s) may perform the necessary tasks.

Systems depicted in some of the figures may be provided in variousconfigurations. In some embodiments, the systems may be configured as adistributed system where one or more components of the system aredistributed across one or more networks in a cloud computing system.

Provided are methods, devices, and computer-program products fordetermining accuracy of device mapping systems. In some examples, anaccuracy score can be determined for a device mapping system. In somecases, the accuracy score can be based on a device map of the devicemapping system. In such cases, the device map can include informationlinking media player devices (also referred to as “devices” or “playerdevices” or “media devices”) that are categorized or associatedtogether. In some examples, a device (or “player device” or “mediaplayer device”) can be defined as a network-connected device, such as asmartphone, tablet, smart TV, laptop, smart watch or other wearabledevice, or any other network-connected device (e.g., Internet-connected,broadband network connected, cellular network connected, or othernetwork-connected device) that can receive and display media content. Insome examples, the device map can be generated based on assigning one ormore category segments (or “categories”) to each device included in thedevice map. In such examples, category segments or categories caninclude demographic attributes, such as annual household income, agegroup, education level, number of television sets, and/or variouspreferences regarding entertainment choices, or any suitable combinationthereof. However, it should be recognized that category segments orcategories can be any logical group that can associate a plurality ofdevices together.

In some examples, the accuracy score can be further based on viewingdata from an automated content recognition (ACR) component or othersystem that can determine media content being viewed by one or moremedia players. In some cases, the media content can include videocontent (which can include audio content) or audio content. The mediacontent can be processed and analyzed (e.g., using an ACR system) todetermine what media content is being viewed by one or more mediaplayers, which can be stored as viewing data. The viewing data can thenbe processed to determine the accuracy score. In such examples, theviewing data (sometimes referred to as viewing behavior) can indicatemedia content being played by a media player device. In some examples,the accuracy score can indicate whether the device mapping system isassigning similar categories to devices that have similar playback ofmedia content. In such examples, the device map can be determined to berandom, indicating that the device mapping system is inaccurate. Incontrast, if the device map is determined to have a sufficiently lowprobability of being merely random in nature, the device mapping systemcan be determined to be accurate.

In some examples, the accuracy score can be used by the device mappingsystem to improve its process for generating the device map. Forexample, the device mapping system can modify one or more operations toattempt to improve the accuracy score.

FIG. 1 illustrates an example of a system for updating a device mapcategorization system 130 (sometimes referred to as a device mappingsystem). In some examples, the system can include one or more devices110, the device map categorization system 120, a viewing behavior system130, or any combination thereof. It should be recognized that one ormore components of the system can be combined into less components orsplit into more components.

In some examples, data from the one or more devices 110 can be processedby one or more components of the system, including the device mapcategorization system 120 and the viewing behavior system 130. The oneor more devices 110 can include laptops (e.g., laptop 112), tablets(e.g., a first tablet 114 or a second tablet 115), phones (e.g., smartphone 116), televisions (e.g., television 118), or any othernetwork-connected device that can receive and display media content(e.g., auditory or visual content). In some examples, the one or moredevices 110 can be included in one or more networks.

As described above, data from the one or more devices 110 can beprocessed by the device map categorization system 120. Processing caninclude assigning one or more category segments to each of the one ormore devices 110 (e.g., using category segment generator 122),generating a device map for the one or more devices 110 (e.g., usingdevice map generator 124), and generating a data report for the devicemap (e.g., using data report generator 126). In some examples, eachdevice in the device map can be assigned at least one category segment(also referred to as a category). In such examples, an category segmentassigned to the device can indicate that the device ranks above athreshold for one or more behaviors and/or one or more characteristicsthat are associated with the category segment. In some examples, thedevice map can indicate links or associations between a plurality ofdevices. Illustrative examples of the data from the one or more devices110 can include cookies from browsers and IP addresses.

In some examples, the data report generator 126 can generate a datareport of the device map and/or the one or more category segments. Insuch examples, the data report can include information for each of theone or more devices 110 and corresponding category segments. In oneillustrative example, the data report can include information as to thetype of device (such as differentiating a smart TV from a mobile tablet)to be used to differentiate TV program playback (e.g., broadcast TV,streaming TV, or other TV program). For example, it can be useful todetermine if particular media content is being viewed on a television ina home or on a handheld device. There are many other uses for havinginformation about category segments that are well known to the skilledperson.

As described above, the one or more devices 110 can also be processed bythe viewing behavior system 130. In some examples, the viewing behaviorsystem 130 can include an automated content recognition (ACR) engine132. The ACR engine 132 can identify media content (e.g., auditory orvisual content) being displayed or played on a device (e.g., a device ofthe one or more devices 110). In such examples, the ACR engine 132 canalso identify a channel or other metadata associated with the mediacontent.

While there are many ways that media content can be identified, onemethod (described in more detail below with respect to FIG. 7) caninclude receiving a pixel cue point associated with a frame of anunknown video segment. In some examples, the pixel cue point can includea set of pixel values corresponding to the frame. The method can furtherinclude identifying a candidate reference data point in a database ofreference data points. In some examples, the candidate reference datapoint can be similar to the pixel cue point. In such examples, thecandidate reference data point can include one or more pixel valuescorresponding to a candidate frame of a candidate video segment. Themethod can further include adding a token to a bin associated with thecandidate reference data point and the candidate video segment anddetermining whether a number of tokens in the bin exceeds a value. Themethod can further include identifying the unknown video segment asmatching the candidate video segment when the number of tokens in thebin exceeds the value. The unknown video segment can then be identifiedas the candidate video segment, indicating that a media device isplaying the candidate video segment.

FIG. 7 illustrates an example of a block diagram of a matching system700 (e.g., the ACR engine 132) for identifying video content beingviewed by a media system. In some examples, the unknown content caninclude one or more unknown data points. In such examples, the matchingsystem 700 can match unknown data points with reference data points toidentify unknown video segments associated with the unknown data points.The reference data points can be included in a reference database 716.

The matching system 700 can include a player device 702 and a matchingserver 704 (e.g., an ACR engine). The player device 702 can include amedia client 706, an input device 708, an output device 710, and one ormore contextual applications 726. The media client 706 (which can be atelevision system, a computer system, or other electronic device capableof connecting to the Internet) can decode data (e.g., broadcast signals,data packets, or other frame data) associated with video programs 728.The media client 706 can place the decoded contents of each frame of thevideo into a video frame buffer in preparation for display or forfurther processing of pixel information of the video frames. In someexamples, the player device 702 can be any electronic decoding systemthat can receive and decode a video signal. The player device 702 canreceive video programs 728 and store video information in a video buffer(not shown). The player device 702 can process the video bufferinformation and produce unknown data points (which can be referred to as“cue points”). The media client 706 can transmit the unknown data pointsto the matching server 704 for comparison with reference data points inthe reference database 716.

The input device 708 can include any suitable device that allows arequest or other information to be input to the media client 706. Forexample, the input device 708 can include a keyboard, a mouse, avoice-recognition input device, a wireless interface for receivingwireless input from a wireless device (e.g., from a remote controller, amobile device, or other suitable wireless device), or any other suitableinput device. The output device 710 can include any suitable device thatcan present or otherwise output information, such as a display, awireless interface for transmitting a wireless output to a wirelessdevice (e.g., to a mobile device or other suitable wireless device), aprinter, or other suitable output device.

The matching system 700 can begin a process of identifying a videosegment by first collecting data samples from known video data sources718. For example, the matching server 104 can collect data to build andmaintain a reference database 716 from a variety of video data sources718. The video data sources 718 can include media providers oftelevision programs, movies, or any other suitable video source. Videodata from the video data sources 718 can be provided as over-the-airbroadcasts, as cable TV channels, as streaming sources from theInternet, and from any other video data source. In some examples, thematching server 704 can process the received video from the video datasources 718 to generate and collect reference video data points in thereference database 716, as described below. In some examples, videoprograms from video data sources 718 can be processed by a referencevideo program ingest system (not shown), which can produce the referencevideo data points and send them to the reference database 716 forstorage. The reference data points can be used as described above todetermine information that is then used to analyze unknown data points.

The matching server 704 can store reference video data points for eachvideo program received for a period of time (e.g., a number of days, anumber of weeks, a number of months, or any other suitable period oftime) in the reference database 716. The matching server 704 can buildand continuously or periodically update the reference database 716 oftelevision programming samples (e.g., including reference data points,which may also be referred to as cues or cue values). In some examples,the data collected is a compressed representation of the videoinformation sampled from periodic video frames (e.g., every fifth videoframe, every tenth video frame, every fifteenth video frame, or othersuitable number of frames). In some examples, a number of bytes of dataper frame (e.g., 25 bytes, 50 bytes, 75 bytes, 100 bytes, or any otheramount of bytes per frame) can be collected for each program source. Anynumber of program sources can be used to obtain video, such as 25channels, 50 channels, 75 channels, 100 channels, 200 channels, or anyother number of program sources.

The media client 706 can send a communication 722 to a matching engine712 of the matching server 704. The communication 722 can include arequest for the matching engine 712 to identify unknown content. Forexample, the unknown content can include one or more unknown data pointsand the reference database 716 can include a plurality of reference datapoints. The matching engine 712 can identify the unknown content bymatching the unknown data points to reference data in the referencedatabase 716. In some examples, the unknown content can include unknownvideo data being presented by a display (for video-based ACR), a searchquery (for a MapReduce system, a Bigtable system, or other data storagesystem), an unknown image of a face (for facial recognition), an unknownimage of a pattern (for pattern recognition), or any other unknown datathat can be matched against a database of reference data. The referencedata points can be derived from data received from the video datasources 718. For example, data points can be extracted from theinformation provided from the video data sources 718 and can be indexedand stored in the reference database 716.

The matching engine 712 can send a request to the candidatedetermination engine 714 to determine candidate data points from thereference database 716. A candidate data point can be a reference datapoint that is a certain determined distance from the unknown data point.In some examples, a distance between a reference data point and anunknown data point can be determined by comparing one or more pixels(e.g., a single pixel, a value representing group of pixels (e.g., amean, an average, a median, or other value), or other suitable number ofpixels) of the reference data point with one or more pixels of theunknown data point. In some examples, a reference data point can be thecertain determined distance from an unknown data point when the pixelsat each sample location are within a particular pixel value range.

In one illustrative example, a pixel value of a pixel can include a redvalue, a green value, and a blue value (in a red-green-blue (RGB) colorspace). In such an example, a first pixel (or value representing a firstgroup of pixels) can be compared to a second pixel (or valuerepresenting a second group of pixels) by comparing the correspondingred values, green values, and blue values respectively, and ensuringthat the values are within a certain value range (e.g., within 0-5values). For example, the first pixel can be matched with the secondpixel when (1) a red value of the first pixel is within 5 values in a0-255 value range (plus or minus) of a red value of the second pixel,(2) a green value of the first pixel is within 5 values in a 0-255 valuerange (plus or minus) of a green value of the second pixel, and (3) ablue value of the first pixel is within 5 values in a 0-255 value range(plus or minus) of a blue value of the second pixel. In such an example,a candidate data point is a reference data point that is an approximatematch to the unknown data point, leading to multiple candidate datapoints (related to different media segments) being identified for theunknown data point. The candidate determination engine 714 can returnthe candidate data points to the matching engine 712.

For a candidate data point, the matching engine 712 can add a token intoa bin that is associated with the candidate data point and that isassigned to an identified video segment from which the candidate datapoint is derived. A corresponding token can be added to all bins thatcorrespond to identified candidate data points. As more unknown datapoints (corresponding to the unknown content being viewed) are receivedby the matching server 704 from the player device 702, a similarcandidate data point determination process can be performed, and tokenscan be added to the bins corresponding to identified candidate datapoints. Only one of the bins corresponds to the segment of the unknownvideo content being viewed, with the other bins corresponding tocandidate data points that are matched due to similar data point values(e.g., having similar pixel color values), but that do not correspond tothe actual segment being viewed. The bin for the unknown video contentsegment being viewed will have more tokens assigned to it than otherbins for segments that are not being watched. For example, as moreunknown data points are received, a larger number of reference datapoints that correspond to the bin are identified as candidate datapoints, leading to more tokens being added to the bin. Once a binincludes a particular number of tokens, the matching engine 712 candetermine that the video segment associated with the bin is currentlybeing displayed on the player device 702. A video segment can include anentire video program or a portion of the video program. For example, avideo segment can be a video program, a scene of a video program, one ormore frames of a video program, or any other portion of a video program.An example of a system for identifying media content is described inU.S. patent application Ser. No. 15/240,801, which is herebyincorporated by reference in its entirety, for all purposes.

Referring back to FIG. 1, in some examples, the ACR engine 132 canoutput an identification of the identified media content (e.g., a videosegment being viewed by a media device). In such examples, the ACRengine 132 can send the identification of the media content, anidentification of a device that the media content was received from, andany other metadata associated with the media content (e.g., a channelthat the media content was being played on) to the statisticalcorrelator 136.

In some examples, the statistical correlator 136 can evaluate the devicemap using the viewing data output from the ACR engine 132 to determine acorrelation between the categories generated using the device mapcategorization system 120 and the viewing behaviors of the groups ofdevices assigned to the different categories. In some cases, thestatistical correlator 136 can determine whether the device mappingsystem that generated the device map is accurate. FIGS. 2A, 2B, and 2Cillustrate examples of graphs for different device mapping systems(e.g., Source A, Source B, and Source C).

In one illustrative example, a graph can include an x-axis for anaverage channel viewing time (i.e., time spent in total) and a y-axisfor channel variance. In such examples, the channel variance canindicate a variance in viewing time between difference channels. In someexamples, each point (e.g., a circle) on a graph can represent ancategory segment or category (e.g., as described above with the categorysegment generator 124). For example, when the category segment is for ahousehold (e.g., a plurality of devices), a circle at (2, 10) canindicate that the household was active for 2 units of time (e.g., hours,minutes, seconds, etc.), and during which one or more channels wereviewed for 10 units of time (e.g., hours, minutes, seconds, etc.) morethan one or more other channels. For another example, when the categorysegment is for a device, a circle at (2, 10) can indicate that thedevice was active for 2 units of time (e.g., hours, minutes, seconds,etc.), and during which one or more channels were viewed for 10 units oftime (e.g., hours minutes, seconds, etc.) more than one or more otherchannels.

While the examples shown in FIGS. 2A, 2B, and 2C include average channelviewing time and channel variance, one of ordinary skill will appreciatethat any other viewing behavior other than channel viewing time (e.g., atype of viewing (such as digital video recording (DVR) viewing or videoon demand (VOD) viewing) or a time that the viewing occurs) can be usedby the statistical correlator 136.

In some examples, the statistical correlator 136 can perform astatistical evaluation of viewing data (e.g., viewing time of videosegments) from the ACR engine 132 and the device map from the device mapcategorization system 120. The statistical evaluation can represent anaccuracy of the predictions of the device map versus viewing data asdetected by the ACR engine 132. For example, the statistical evaluationcan indicate whether there is a correlation between devices with similarviewing data and the categories that were assigned to the devices. Asanother example, the statistical correlator 136 can determine howchannel viewing varies between each category segment. It should berecognized that the statistical evaluation can be performed using anysuitable statistical evaluation technique, including, for example,analysis of variance (ANOVA), chi-squared, f-test, t-test, anycombination thereof, or the like. For illustrative purposes, ANOVA willbe used as an example herein. However, one of ordinary skill willappreciate that any other suitable statistical evaluation test can beused by the statistical correlator 136 to determine a correlation.

ANOVA can be used to analyze differences between means (or averages) oflogical groups. In some examples, a mean of information associated withthe ACR engine 132 can be calculated for each category segment receivedfrom the device map categorization system 120. For example, for eachdevice, a variance in viewing time between different channels can becalculated (e.g., as shown in FIGS. 2A, 2B, and 2C). For each categorysegment, the variance can be averaged across each device such that amean variance is calculated. The mean variance can be the mean ofinformation. In another example, a mean of information associated withthe ACR engine 132 can be calculated for each household based on thecomposite device map for said household.

In some examples, ANOVA can compare two types of variances: the variancewithin each category segment and the variance between different categorysegments. To calculate the variances, a sum of squares (SS) betweendifferent category segments (referred to as a “SS between”) can becomputed: SS_(between)=Σn(x−x)², where x-bar (x) is an category segmentmean and x-double-bar (x) is an overall mean. In some examples, avariance between different category segments (referred to as a “variancebetween”) can be computed:

${{variance}_{between} = \frac{\sum{n\left( {\overset{\_}{x} - \overset{\_}{\overset{\_}{x}}} \right)}^{2}}{k - 1}},$where k is a number of distinct samples. In some examples, a variancewithin each category segment (referred to as a “variance within”) canalso be computed: SS_(within)=ΣΣn(x−x)². In one illustrative example,the following equation can be used to obtain the variance within:

${variance}_{within} = {\frac{{SS}_{within}}{n - k}.}$

After the variance between and variance within are calculated, anF-ratio can be computed. The F-ratio can be based on the variancebetween and variance within:

$F = {\frac{{variance}_{between}}{{variance}_{within}}.}$The F-ratio can indicate an amount of randomness with the data. In someexamples, a critical value for the F-ratio can be identified such thatwhen the F-value is less than the critical value, the device mappingsystem fails the test (i.e., the data is identified as random). FIG. 3illustrates an example of calculating F-ratios for each of the sourcesdescribed in FIGS. 2A, 2B, and 2C. As can be seen, the F-ratios in FIG.3 indicate that Source C and Source A (from FIGS. 2A and 2C) pass thetest with F>Fcrit and Source B (from FIG. 2B) fails the test. In someexamples, the critical value can be adjusted depending on device mappingsystems that are analyzed. In some examples, the lower the F-ratio is,the better the implied quality of the underlying match.

In some examples, the statistical correlator 126 can send a message tothe category measure system 120 (e.g., to the category segment generator122 or the device map generator 124). In such examples, the message canindicate whether the data report is satisfactory in light of mediacontent from the one or more devices 110. In some examples, the datareport can be satisfactory when it is determined that the categories donot appear to be random based on the statistical evaluation performed bythe statistical correlator 136. Using this methodology to score devicemap systems, modifications to the device map systems can be identifiedand compared to other accuracy scores to determine progress of themodifications.

FIG. 4 illustrates an example of a process 400 for assigning an accuracyscore to a device mapping system. In some examples, the process 400 canbe performed by a computer system.

Process 400 is illustrated as a logical flow diagram, the operation ofwhich represent a sequence of operations that can be implemented inhardware, computer instructions, or a combination thereof. In thecontext of computer instructions, the operations representcomputer-executable instructions stored on one or more computer-readablestorage media that, when executed by one or more processors, perform therecited operations. Generally, computer-executable instructions includeroutines, programs, objects, components, data structures, and the likethat perform particular functions or implement particular data types.The order in which the operations are described is not intended to beconstrued as a limitation, and any number of the described operationscan be combined in any order and/or in parallel to implement theprocesses.

Additionally, the process 400 can be performed under the control of oneor more computer systems configured with executable instructions and canbe implemented as code (e.g., executable instructions, one or morecomputer programs, or one or more applications) executing collectivelyon one or more processors, by hardware, or combinations thereof. Asnoted above, the code can be stored on a machine-readable storagemedium, for example, in the form of a computer program comprising aplurality of instructions executable by one or more processors. Themachine-readable storage medium can be non-transitory.

The process 400 can include obtaining a plurality of categories assignedto groups of media player devices (step 410). In some examples, theplurality of categories can be determined using a device mapping system.In such examples, a category can include a categorization for a group ofmedia player devices (e.g., an category segment, a device segment, aviewing segment, or the like), such as: incomes associated with users ofthe groups of media player devices, age groups of users of the groups ofmedia player devices, education levels of users of the groups of mediaplayer devices, or numbers of devices in the groups of media playerdevices. In some examples, a media player device can be anetwork-connected device that can receive and display media content.Examples of media player devices can include a smartphone, a tablet, asmart TV, a laptop, or any other suitable network-connected device.

The process 400 can further include determining viewing behaviors of thegroups of media player devices (step 420). In some examples, the viewingbehaviors can include at least one or more of an amount of time that thegroups of media player devices view one or more of a plurality ofchannels, recorded programming (e.g., from a DVR), live programming,video-on-demand content, content from the Internet (e.g., YouTube orNetFlix), a specific programming type (e.g., sports or realitytelevision), or any combination thereof. In some examples, the viewingbehaviors can be determined using automated content recognition (ACR).For example, the ACR can match viewed media content viewed by the mediaplayer devices with stored media content. In such examples, mediacontent can be auditory or visual (e.g., audio, video, or still image).

In examples where media content is video content, performing theautomated content recognition can include receiving a pixel cue pointassociated with a frame of an unknown video segment, wherein the pixelcue point includes a set of pixel values corresponding to the frame;identifying a candidate reference data point in a database of referencedata points, wherein the candidate reference data point is similar tothe pixel cue point, and wherein the candidate reference data pointincludes one or more pixel values corresponding to a candidate frame ofa candidate video segment; adding a token to a bin associated with thecandidate reference data point and the candidate video segment;determining whether a number of tokens in the bin exceeds a value; andidentifying the unknown video segment as matching the candidate videosegment when the number of tokens in the bin exceeds the value.

The process 400 can further include determining a correlation betweenthe plurality of categories and the viewing behaviors of the groups ofmedia player devices (step 430). In some examples, the correlationbetween the plurality of categories and the viewing behaviors of thegroups of media player devices can be based on a variance in viewingbehavior among the plurality of categories.

The process 400 can further include determining an accuracy score forthe device mapping system using the determined correlation (step 440).In some examples, determining the accuracy score of the device mappingsystem includes performing a statistical hypothesis test (e.g., such asthe F-ratio test described above) to determine whether the correlationbetween the plurality of categories and the viewing behaviors of thegroups of media player devices is random. In some examples, the process300 can further include comparing a result of the statistical hypothesistest to a randomness threshold (sometimes reference to as a criticalvalue) and determining the correlation is random when the result is lessthan the randomness threshold. In some examples, the accuracy score canbe determined for the device mapping system based on the comparison ofthe result of the statistical hypothesis test to the randomnessthreshold.

The process 400 can further include assigning (or sending) the accuracyscore to the device mapping system (step 450). In some examples, theaccuracy score can be used to improve the device mapping system. Forexample, an optimization algorithm (such as hill climbing) can be usedto compare an updated accuracy score to the accuracy score, where theupdated accuracy score is determined after updating one or moreparameters of the device mapping system.

FIG. 5 illustrates an example of a process 500 for evaluating thestatistical correlation of a plurality of devices to predictedstatistical attributes. In some examples, the process 500 can beperformed by a computer system, such as the viewing behavior system 130.

Process 500 is illustrated as a logical flow diagram, the operation ofwhich represent a sequence of operations that can be implemented inhardware, computer instructions, or a combination thereof. In thecontext of computer instructions, the operations representcomputer-executable instructions stored on one or more computer-readablestorage media that, when executed by one or more processors, perform therecited operations. Generally, computer-executable instructions includeroutines, programs, objects, components, data structures, and the likethat perform particular functions or implement particular data types.The order in which the operations are described is not intended to beconstrued as a limitation, and any number of the described operationscan be combined in any order and/or in parallel to implement theprocesses.

Additionally, the process 500 can be performed under the control of oneor more computer systems configured with executable instructions and canbe implemented as code (e.g., executable instructions, one or morecomputer programs, or one or more applications) executing collectivelyon one or more processors, by hardware, or combinations thereof. Asnoted above, the code can be stored on a machine-readable storagemedium, for example, in the form of a computer program comprising aplurality of instructions executable by one or more processors. Themachine-readable storage medium can be non-transitory.

The process 500 can include calculating a value for each of one or moredevices (step 510). In some examples, the value can be a number of hoursthat a device is tuned to each channel of one or more channels availableto the device. In some examples, the one or more devices can beindicated by a device mapping system. In such examples, the devicemapping system can provide an indication of the one or more devices anda particular category (sometimes referred to as an category segment) foreach of the one or more devices.

The process 500 can further include performing a statistical analysisfor the value for each of the one or more devices to identify howchannel viewing varies between each segment indicated by the devicemapping system (step 520). In some examples, the statistical analysiscan be analysis of variance (ANOVA), chi-squared, f-test, t-test, or thelike. If the statistical analysis is ANOVA, the process 500 can furtherinclude: determining that the segments are poorly identified by thedevice mapping system when there is a low amount of variance between thesegments (step 530), determining that the segments correlate to viewingbehaviors when there is a high amount of variance between the segments(step 540), and performing an F-test (or other suitable statisticalanalysis test or statistical hypothesis test) to determine whether thereis a low amount or a high amount of variance between the segments.

FIG. 6 illustrates an example of a process 600 for comparing predictedviewing behavior to actual viewing as measured by an automatic contentrecognition component. In some examples, the process 600 can beperformed by a computer system, such as the viewing behavior system 130.

Process 600 is illustrated as a logical flow diagram, the operation ofwhich represent a sequence of operations that can be implemented inhardware, computer instructions, or a combination thereof. In thecontext of computer instructions, the operations representcomputer-executable instructions stored on one or more computer-readablestorage media that, when executed by one or more processors, perform therecited operations. Generally, computer-executable instructions includeroutines, programs, objects, components, data structures, and the likethat perform particular functions or implement particular data types.The order in which the operations are described is not intended to beconstrued as a limitation, and any number of the described operationscan be combined in any order and/or in parallel to implement theprocesses.

Additionally, the process 600 can be performed under the control of oneor more computer systems configured with executable instructions and canbe implemented as code (e.g., executable instructions, one or morecomputer programs, or one or more applications) executing collectivelyon one or more processors, by hardware, or combinations thereof. Asnoted above, the code can be stored on a machine-readable storagemedium, for example, in the form of a computer program comprising aplurality of instructions executable by one or more processors. Themachine-readable storage medium can be non-transitory.

The process 600 can include obtaining a device map for one or moredevices (step 610). In some examples, the one or more devices can eachbe media devices that make up a household. In some examples, the devicemap can be generated by a third-party system. In such examples, thedevice map can be generated based on raw data (e.g., internet protocol(IP) traffic such as use of a local area connection and/or the Internet,including time spent on email, Facebook, YouTube, or the like). In otherexamples, the raw data can be assembled by collecting browser data suchas cookies and other data mining activities from the one or moredevices.

In some examples, a request for the device map can include an indicationof one or more devices that the device map should be based on. In otherexamples, the request can include the raw data. A person of ordinaryskill in the art will recognize that the device map may be generatedusing proprietary processes, which is known in the art. Data used ingenerating a device map can be derived from analyzing cookies thatcollect on devices as a user accesses various Internet sites. In someexamples, the type of Internet-connected device can be derived fromremotely querying configuration information within a device.

The process 600 can further include associating (or mapping) the devicemap to media content viewing (step 620). In some examples, associatingcan include associating an IP address of the device map to an IP addressof a device being monitored for media content viewing (using some formof content recognition). In such examples, associating can also includeassociating media content viewing detected from the device with the IPaddress of the device map. An example of associating a device map tomedia content viewing would be where a device map predicts that theassociated household likes culinary things because they search websitesthat feature food recipes and kitchen tools which then maps to their TVviewing of the Food channel.

The process 600 can further include generating a first database forviewing statistics based on data from one or more reference sources(e.g., one or more devices such as a television in a home) (step 630).In some examples, the first database can be generated by a third partyusing proprietary processes of associating Internet activity gatheredfrom one or more devices of a device map. In such examples, theproprietary processes do not use actual viewing records. In someexamples, the first database can be used to associate viewer interestwith media content viewing. For example, the first database canassociate media content viewing with product interest, such as specificautomobile brands.

The process 600 can further include generating a second database forvideo segment viewing using automated content recognition (step 640). Insome examples, the automated content recognition can identify mediacontent being viewed on one or more media devices (as described herein).The identified media content can be analyzed to determine what is beingviewed by the one or more media devices. Based on what is being viewed,the second database can be generated to include information on viewingbehavior of the one or more devices.

The process 600 further includes performing a statistical evaluation(e.g., a statistical correlation as described above) using the firstdatabase and the second database (step 650). In some examples, thestatistical evaluation can compare the first database and the seconddatabase.

The process 600 further includes evaluating the device map based on thestatistical evaluation (step 660). For example, if the statisticalevaluation indicates that one or more category segments were selectedrandomly, the device map can be determined to be inadequate. However, ifthe statistical evaluation indicates that one or more category segmentscorrelate with viewing behavior, the device map can be determined to beaccurate. In some examples, the process 600 can be recursive such thatwhen step 660 ends, the process 600 can repeat steps 630, 640, 650, and660.

FIG. 8 illustrates an example of a process flow for various devices. Insome examples, the process flow can include a media device 801. Themedia device 801 can generate cue point data (sometimes referred to as afingerprint) of video programming currently being displayed on the mediadisplay 801. The media device 801 can send the cue point data to cuepoint manager 802. The cue point manager 802 can process and/or identifywhat is being displayed on the media display 801 using the cue pointdata and an automatic content recognition system (as described herein).

In some examples, the process flow can further include a cue point cache806. The cue point cache 806 can be a storage device for supportingingest (storage) of cue point data. The process flow can further includea real-time reference database 804. The real-time reference database 804can be a database of television programming currently available on oneor more television channels. The real-time reference database 804 cangather and process the one or more television channels for the purposeof comparison to the cue point data from the media device 801 foridentifying video segments currently being displayed on the media device801.

In some examples, the process flow can further include a search router803. The search router 803 can accept device map information for one ormore devices in a household (such as devices 805A, 805B, 805C, and 805D)for the purpose of correlating the device map information with viewinginformation from the media device 801.

FIGS. 9-11 illustrate examples of charts that represent an associationof household income to TV viewing hours per month. The charts are eachfrom a different vendor and are correlated against TV viewing as learnedfrom direct measurement of an ACR system to test the quality of datafrom each vendor.

FIG. 9 illustrates an example of a first match rate of 47% equatingincome codes versus viewing hours per month. As can be seen, aprobability that the two factors are unrelated is small at 9×10^−17. Theprobability indicates that the match process is likely good.

FIG. 10 illustrates an example of a second match of 62% equating incomecodes versus viewing hours per month. As can be seen, a probability thatthe two factors are unrelated has gone down by three orders of magnitudein comparison to FIG. 9. Therefore, the second match in totality hasreduced randomness in the system and is better than the first (the lowerthe score the better).

FIG. 11 illustrates an example of media devices only found in data settwo equating income code versus viewing hours per month.

In the foregoing specification, aspects of the invention are describedwith reference to specific embodiments thereof, but those skilled in theart will recognize that the invention is not limited thereto. Variousfeatures and aspects of the above-described invention may be usedindividually or jointly. Further, embodiments can be utilized in anynumber of environments and applications beyond those described hereinwithout departing from the broader spirit and scope of thespecification. The specification and drawings are, accordingly, to beregarded as illustrative rather than restrictive. In addition, whilesystems have been described, it should be recognized that a system canbe one or more servers. In addition, the ACR engine 132, the statisticalcorrelator 136, the external data ingestor 134, the category segmentgenerator 122, the device map generator 124, the data report generator126, the device mapping system, the viewing behavior system 130, thedevice map categorization system 120, or the like can be implemented byone or more servers.

In the foregoing description, for the purposes of illustration, methodswere described in a particular order. It should be appreciated that inalternate embodiments, the methods may be performed in a different orderthan that described. It should also be appreciated that the methodsdescribed above may be performed by hardware components or may beembodied in sequences of machine-executable instructions, which may beused to cause a machine, such as a general-purpose or special-purposeprocessor or logic circuits programmed with the instructions to performthe methods. These machine-executable instructions may be stored on oneor more machine readable mediums, such as CD-ROMs or other type ofoptical disks, floppy diskettes, ROMs, RAMs, EPROMs, EEPROMs, magneticor optical cards, flash memory, or other types of machine-readablemediums suitable for storing electronic instructions. Alternatively, themethods may be performed by a combination of hardware and software.

Where components are described as being configured to perform certainoperations, such configuration can be accomplished, for example, bydesigning electronic circuits or other hardware to perform theoperation, by programming programmable electronic circuits (e.g.,microprocessors, or other suitable electronic circuits) to perform theoperation, or any combination thereof.

While illustrative embodiments of the application have been described indetail herein, it is to be understood that the inventive concepts may beotherwise variously embodied and employed, and that the appended claimsare intended to be construed to include such variations, except aslimited by the prior art.

What is claimed is:
 1. A system comprising: one or more processors; andone or more non-transitory machine-readable storage media containinginstructions that, when executed on the one or more processors, causethe one or more processors to perform operations including: obtain aplurality of categories assigned to groups of media player devices,wherein the plurality of categories are determined using a devicemapping system, and wherein a category includes a categorization for agroup of the media player devices; determine viewing behaviors of thegroups of media player devices, wherein the viewing behaviors aredetermined using automated content recognition by matching viewed mediacontent viewed by the media player devices with stored media content;determine a correlation between the plurality of categories and theviewing behaviors of the groups of media player devices; determine anaccuracy score for the device mapping system using the determinedcorrelation; and assign the accuracy score to the device mapping system,wherein the accuracy score is used to improve the device mapping system.2. The system of claim 1, wherein the correlation between the pluralityof categories and the viewing behaviors of the groups of media playerdevices is based on a variance in viewing behaviors among the pluralityof categories.
 3. The system of claim 2, wherein determining theaccuracy score for the device mapping system includes performing astatistical hypothesis test to determine whether the correlation betweenthe plurality of categories and the viewing behaviors of the groups ofmedia player devices is random.
 4. The system of claim 3, furthercomprising instructions which when executed on the one or moreprocessors, cause the one or more processors to perform operationsincluding: compare a result of the statistical hypothesis test to arandomness threshold; and determine the correlation is random when theresult is less than the randomness threshold.
 5. The system of claim 4,wherein the accuracy score is determined for the device mapping systembased on the comparison of the result of the statistical hypothesis testto the randomness threshold.
 6. The system of claim 1, wherein mediacontent is video content, and wherein performing the automated contentrecognition includes: receiving a pixel cue point associated with aframe of an unknown video segment, wherein the pixel cue point includesa set of pixel values corresponding to the frame; identifying acandidate reference data point in a database of reference data points,wherein the candidate reference data point is similar to the pixel cuepoint, and wherein the candidate reference data point includes one ormore pixel values corresponding to a candidate frame of a candidatevideo segment; adding a token to a bin associated with the candidatereference data point and the candidate video segment; determiningwhether a number of tokens in the bin exceeds a value; and identifyingthe unknown video segment as matching the candidate video segment whenthe number of tokens in the bin exceeds the value.
 7. The system ofclaim 1, wherein the viewing behaviors include at least one or more ofan amount of time of the groups of media player devices view one or moreof a plurality of channels, incomes associated with users of the groupsof media player devices, age groups of users of the groups of mediaplayer devices, education levels of users of the groups of media playerdevices, or numbers of devices in the groups of media player devices. 8.A method comprising: obtaining a plurality of categories assigned togroups of media player devices, wherein the plurality of categories aredetermined using a device mapping system, and wherein a categoryincludes a categorization for a group of the media player devices;determining viewing behaviors of the groups of media player devices,wherein the viewing behaviors are determined using automated contentrecognition by matching viewed media content viewed by the media playerdevices with stored media content; determining a correlation between theplurality of categories and the viewing behaviors of the groups of mediaplayer devices; determining an accuracy score for the device mappingsystem using the determined correlation; and assigning the accuracyscore to the device mapping system, wherein the accuracy score is usedto improve the device mapping system.
 9. The method of claim 8, whereinthe correlation between the plurality of categories and the viewingbehaviors of the groups of media player devices is based on a variancein viewing behaviors among the plurality of categories.
 10. The methodof claim 9, wherein determining the accuracy score for the devicemapping system includes performing a statistical hypothesis test todetermine whether the correlation between the plurality of categoriesand the viewing behaviors of the groups of media player devices israndom.
 11. The method of claim 10, further comprising: comparing aresult of the statistical hypothesis test to a randomness threshold; anddetermining the correlation is random when the result is less than therandomness threshold.
 12. The method of claim 11, wherein the accuracyscore is determined for the device mapping system based on thecomparison of the result of the statistical hypothesis test to therandomness threshold.
 13. The method of claim 8, wherein media contentis video content, and wherein performing the automated contentrecognition includes: receiving a pixel cue point associated with aframe of an unknown video segment, wherein the pixel cue point includesa set of pixel values corresponding to the frame; identifying acandidate reference data point in a database of reference data points,wherein the candidate reference data point is similar to the pixel cuepoint, and wherein the candidate reference data point includes one ormore pixel values corresponding to a candidate frame of a candidatevideo segment; adding a token to a bin associated with the candidatereference data point and the candidate video segment; determiningwhether a number of tokens in the bin exceeds a value; and identifyingthe unknown video segment as matching the candidate video segment whenthe number of tokens in the bin exceeds the value.
 14. The method ofclaim 8, wherein the viewing behaviors include at least one or more ofan amount of time of the groups of media player devices view one or moreof a plurality of channels, incomes associated with users of the groupsof media player devices, age groups of users of the groups of mediaplayer devices, education levels of users of the groups of media playerdevices, or numbers of devices in the groups of media player devices.15. A computer-program product tangibly embodied in a non-transitorymachine-readable storage medium, including instructions that, whenexecuted by the one or more processors, cause the one or more processorsto: obtain a plurality of categories assigned to groups of media playerdevices, wherein the plurality of categories are determined using adevice mapping system, and wherein a category includes a categorizationfor a group of the media player devices; determine viewing behaviors ofthe groups of media player devices, wherein the viewing behaviors aredetermined using automated content recognition by matching viewed mediacontent viewed by the media player devices with stored media content;determine a correlation between the plurality of categories and theviewing behaviors of the groups of media player devices; determine anaccuracy score for the device mapping system using the determinedcorrelation; and assign the accuracy score to the device mapping system,wherein the accuracy score is used to improve the device mapping system.16. The computer-program product of claim 15, wherein the correlationbetween the plurality of categories and the viewing behaviors of thegroups of media player devices is based on a variance in viewingbehaviors among the plurality of categories.
 17. The computer-programproduct of claim 16, wherein determining the accuracy score for thedevice mapping system includes performing a statistical hypothesis testto determine whether the correlation between the plurality of categoriesand the viewing behaviors of the groups of media player devices israndom.
 18. The computer-program product of claim 17, further includinginstructions that, when executed by the one or more processors, causethe one or more processors to: compare a result of the statisticalhypothesis test to a randomness threshold; and determine the correlationis random when the result is less than the randomness threshold.
 19. Thecomputer-program product of claim 18, wherein the accuracy score isdetermined for the device mapping system based on the comparison of theresult of the statistical hypothesis test to the randomness threshold.20. The computer-program product of claim 15, wherein media content isvideo content, and wherein performing the automated content recognitionincludes: receiving a pixel cue point associated with a frame of anunknown video segment, wherein the pixel cue point includes a set ofpixel values corresponding to the frame; identifying a candidatereference data point in a database of reference data points, wherein thecandidate reference data point is similar to the pixel cue point, andwherein the candidate reference data point includes one or more pixelvalues corresponding to a candidate frame of a candidate video segment;adding a token to a bin associated with the candidate reference datapoint and the candidate video segment; determining whether a number oftokens in the bin exceeds a value; and identifying the unknown videosegment as matching the candidate video segment when the number oftokens in the bin exceeds the value.